Magnetic loom-braking device

ABSTRACT

An electrical system for selectively energizing and deenergizing a magnetic brake associated with a loom from both a local station and a remote station regardless of the station at which the previous energization or deenergization occurred, and including a high-voltage primary circuit containing such local station for locally energizing and deenergizing the brake, and a low-voltage secondary circuit which is electrically insulated from the primary circuit and contains such remote station for remotely energizing and deenergizing the brake. A pilot circuit in the primary circuit includes pilot lamps at the local and remote stations and at the production maintenance department to indicate that the loom brake has been energized.

O United States Patent 1151 3,636,375 Armstrong [4 Jan. 18, 1972 1541 MAGNETIC LOOM-BRAKING DEVICE 3,558,902 1/1971 Casey ..307/1 14 [72] Inventor: 3:32 fi:; 143 Nassau Primary Examiner-John W. Caldwell Assistant Examiner-William M. Wannisky [22] Filed: Jan. 29, 1970 Attorney-Sommer, Weber & Gastel [2]] Appl. No.: 6,691 [57] ABSTRACT An electrical system for selectively energizing and deenergiz- [52] U.S.Cl ..307/ll4,307/lEJ325236? ingamagnetic brake associated Withaloom from bothalocal I t CI "01h 47/00 station and a remote station regardless of the station at which d 252 R the previous energization or deenergization occurred, and in- 0 7 136 5 eluding a high-voltage primary circuit containing such local station for locally energizing and deenergizing the brake, and a low-voltage secondary circuit which is electrically insulated [56] References Cited from the primary circuit and contains such remote station for UNITED STATES PATENTS remotely energizingand deenergizing the brake. A pilot circu1t in the primary c1rcu1t includes pilot lamps at the local and 3,496-379 2/1970 Platzel' "307/114 remote stations and at the production maintenance depart- 1 g l ment to indicate that the loom brake has been energized. arlssi 3,514,626 5/1970 Platzer, Jr ..307/1 14 9 Claims, 1 Drawing Figure MAGNETIC LOOM-BRAKING DEVICE BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved electrical switching system for selectively energizing and deenergizing electrical apparatus from both first and second stations regardless of the station at which the previous energization or deenergization occurred, and more particularly to such a system which is particularly adapted for use in conjunction with a brake of a weaving loom.

2. Description of the Prior Art In the weaving industry it is required to periodically start and stop a loom under certain conditions. This is ordinarily done by the use of controls at a local station. However, a weaving plant is generally laid out so that the production surveillance department is located at a considerable distance from the'loom, and it is desirable to also provide controls at the production surveillance department to permit personnel there to start and stop a loom, as required, as well as permitting this starting or stopping to be effected from the local station. In addition, it is desirable to alert personnel at the local station, remote station, and production maintenance department that the loom brake has been actuated, whenever this has been done from either station.

SUMMARY OF THE INVENTION The present invention is directed to an improved electrical circuitcapable of accomplishing the foregoing.

It is one object of the present invention to provide an improved electrical switching system for energizing an deenergizing electrical apparatus from both a local station and a remote station, said system being characterized by the fact that it basically uses only relays and start and stop switches integrated with each other and the associated circuitry in an extremely simple and efficient manner.

Another object of the present invention is to provide an improved electrical system of the above-described type which includes a primary circuit for energizing an electrical device from a local station and a secondary circuit for energizing the electrical device from a remote station with the primary and secondary circuits being electrically insulated from each other.

A further object of the present invention is to provide an improved electrical system as described above which also integrates therein in a simple manner pilot lamps at various stations to provide infonnation as to whether the electrical device is energized. Other objects and attendant advantages of the present invention will readily be perceived hereafter.

The present invention relates to an electrical system for selectively energizing and deenergizing an electrical device from both local and remote stations regardless of the station at which previous energization or deenergization occurred, and comprising primary circuit means including such device, local switch means at such local station and first relay means, for selectively energizing such device from such local station upon actuation of such local switch means actuating such first relay means to complete such primary circuit means to such device and for selectively deenergizing such device from such local station upon deactuation of such local switch means deactuating such first relay means to break such primary circuit means to such device, and separate secondary circuit means electrically insulated from such primary circuit means and including remote switch means at such remote station, second relay means operatively associated with such first relay means and third relay means operatively associated with such first relay means, for selectively energizing such device from such remote station upon actuation of such remote switch means actuating such second relay means actuating such first relay means to complete such primary circuit means to such device and for selectively deenergizing such device from such remote station upon deactuation of such remote switch means deactuating such third relay means deactuating such first relay means to break such primary circuit means to such device.

BRIEF DESCRIPTION OF THE DRAWING The present invention will be more fully understood when the following portions of the specification are read in conjunction with the accompanying drawing, which is a schematic cir cuit diagram of a preferred embodiment of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT The improved circuit of the present invention includes a primary circuit 11 having a local station 12 for selectively energizing and deenergizing a magnetic loom-braking device 13 associated with loom shaft 13', a secondary circuit 14 for achieving the same function from a remote station 15 at the plant surveillance department, and in primary circuit 11 a pilot circuit 16 which includes a'signal lamp 40 located at the plant maintenance department and a signal lamp 45 located at the remote station 15. While the present circuit will be described with respect to a loom-braking device, it will be ap preciated that it has equal utility in any environment wherein an electrical device is to be interchangeably energized and deenergized from both a local station and a remote station regardless of where the previous energization or deenergization occurred.

In order to energize the loom brake 13 from the local station 12, it is merely necessary to depress normally open local start switch 17 against the bias of its spring 18, thereby to complete a circuit from the high-voltage source 19, which may be volts AC, via line 20, through the following components in series: lead 21, normally closed solenoid armature switch 22, lead 23, normally closed switch armature 24, lead 25, now-closed switch armature 26, lead 27, solenoid coil 28, lead 29 and line 30, back to the voltage source. This will energize relay 31 to cause switch portions or annatures 32 and 33 thereof to close and complete a circuit to the loom brake 13 through lines 20, 20', 30' and 30 and at the same time ignite lamp 34 at the local station showing that the brake has been energized. The energization of relay 31 will also cause armature switch portion 35 thereof to engage contact 36, thereby to complete a loop circuit coupled across start switch 17 from lead 25 to lead 27 via lead 37, transformer primary 38, lead 39, pilot lamp 40, lead 41, now-closed switch armature 35, and lead 42. The current flow through the foregoing circuit achieves three functions. First of all, it acts as a holding circuit to maintain relay 3] energized upon the release of start switch 17. Secondly, it causes the ignition of pilot lamp 40 at the maintenance section of the plant to indicate that the brake 13 is energized. Thirdly it energizes the secondary 43 of transformer 44 to ignite lamp 45 at the remote station, lamp 45 being connected in parallel across transformer secondary 43 by leads 46 and 47.

In the event it is desired to deenergize loom brake 13, it is merely necessary to depress normally closed stop switch 48 against the bias of spring 49 at the local station to cause armature 24 to terminate its bridging engagement across leads 23 and 25. This will open the circuit to solenoid 28 which in turn will cause it to return to its normally open position shown in the drawing, thereby breaking the circuit to loom brake 13. This will be followed by the extinguishing of lamps 34, 40 and 45 to indicate at both the local and remote stations and at the maintenance department that the loom brake is no longer energized.

The loom brake 13 may also be energized and deenergized from the remote station 15 at the production surveillance department. This is preferably achieved through a low-voltage circuit which uses existing telephone lines at voltages normally employed in telephone circuitry. Accordingly, if it is desired to energize loom brake 13 from station 15, it is merely necessary to actuate normally open remote start switch 50 by moving it against the bias of spring 51 to thereby complete a circuit across telephone line voltage source 52 through solenoid coil 58 via line 53, lead 55, now-closed switch armature 56, lead 57, solenoid 58, lead 59 and line 54, This will cause normally open relay switch 60 to move from its open position to a position wherein it bridges leads 61 and 62 thereby completing a loop circuit coupled across local start switch 17 and energizing serieseconnected solenoid 28 of relay 31 which closes armature switches 32 and 35 and energizes the loom brake 13 because of the completion of the various circuits described above. It will be appreciated that upon the release of switch 50, relay 63, which is of the type normally used in telephone circuits, will be deenergized which is followed by the opening of armature switch 60. However, relay 31 will remain energized because of its holding loop circuit which is coupled across both local start switch 17 and armature switch 60.

If it is desired to deenergize the brake 13 from the remote station 15, it is merely necessary to actuate normally closed remote switch 64, which is in parallel with remote start switch 50, by moving armature 65 thereof against the bias of spring 66 to disrupt the flow to relay 67, which is of the type normally used in telephone circuits and which is normally energized and connected across lines 53 and 54 by leads 68 and 69, normally closed armature 65, and lead 70. Upon the deenergization of relay 67, armature switch 22 thereof will open the circuit to solenoid 28, thereby causing switches 32 and 33 to open to terminate the energization of brake 13. When stop switch 64 is released, it will return to its closed position as shown in the drawing. However, at this time the holding circuit for relay 31 has been broken, as described above, and therefore the brake 13 will remain deenergized.

From the foregoing description it will readily be appreciated that even though brake 13 may have been energized at the local station 12, it can be deenergized from the remote station by merely actuating normally closed stop switch 64 to break the circuit to relay 67 which in turn breaks the circuit to relay 31 which in turn opens the circuit to loom brake 13. On the other hand, even though the brake circuit may normally have been energized by closing start switch 50 at the remote station 15 in the above-described manner, the circuit may be opened by actuating normally closed stop switch 48 at the local station to thus break the circuit to relay 3] in the abovedescribed manner. It will be appreciated that the primary circuit 11 and the secondary circuit 14 are electrically insulated from each other so as to permit two different voltage sources to be used without interfering with each other.

Thus, the circuit of the present invention is capable of providing remote energization and deenergization of an electrical device by the use of a plurality of relays which are integrated in a primary circuit and a secondary circuit in an extremely simple and economical manner. Furthermore, by the use of existing telephone wiring which already extends between the remote and local stations, control of the loom brake may be effected from the remote station in an extremely simple and effective manner.

lclaim:

1. An electrical system for selectively energizing and deenergizing an electrical device from both local and remote stations regardless of the station at which the previous energization or deenergization occurred, and wherein the improvement comprises: primary circuit means including said device, local switch means at said local station and first relay means, for selectively energizing said device from said local station upon actuation of said local switch means actuating said first relay means to complete said primary circuit means to said device and for selectively deenergizing said device from said local station upon deactuation of said local switch means deactuating said first relay means to break said primary circuit means to said device, and separate secondary circuit means electrically insulated from said primary circuit means and including remote switch means at said remote station, second relay means operatively associated with said first relay means and third relay means operatively associated with said first relay means, for selectively energizing said device from said remote station upon actuation of said remote switch means actuating said second relay means actuating said first relay means to complete said primary circuit means to said device and for selectively deenergizing said device from said remote station upon deactuation of said remote switch means deactuating said third relay means deactuating said first relay means to break said primary circuit means to said device.

2. The electrical system of claim 1 wherein said local switch means include a normally open local start switch, and said first relay means include a normally deenergized first coil in series with said local start switch and a normally open first armature switch coupled across said local start switch, whereupon closing of said local start switch energizes said first coil which closes said first armature switch to maintain said first coil energized upon release of said local start switch.

3. The electrical system of claim 2 wherein said local switch means include a normally closed local stop switch in series with said first coil, whereupon opening of said local stop switch following release of said local start switch deenergizes said first coil which opens said first armature switch.

4. The electrical system of claim 1 wherein said remote switch means include a normally open remote start switch, said second relay means include a nonnally deenergized second coil in series with said remote start switch and a normally open second armature switch, and said first relay means include a normally deenergized first coil in series with said normally open second armature switch and a normally open first armature switch coupled across said second armature switch, whereupon closing of said remote start switch energizes said second coil which closes said second armature switch energizing said first coil which closes said first armature switch to maintain said first coil energized upon release of said remote start switch.

5. The electrical system of claim 4 wherein said remote switch means include a normally closed remote stop switch in parallel with said remote start switch and said third relay means include a normally energized third coil in series with said remote stop switch and a normally closed third armature switch in series with said first coil, whereupon opening of said remote stop switch following release of said remote start switch deenergizes said third coil which opens said third armature switch deenergizes first coil which opens said first armature switch.

6. The electrical system of claim 1 wherein said local switch means include a normally open local start switch, said first relay means include a normally deenergized first coil in series with said local start switch and a normally open first annature switch coupled across said local start switch, whereupon closing of said local start switch energizes said first coil which closes said first armature switch to maintain said first coil energized upon release of said local start switch, said remote switch means include a normally open remote start switch, and said second relay means include a normally deenergized second coil in series with said remote start switch and a normally open second armature switch coupled across said local start switch, whereupon closing of said remote start switch energizes said second coil which closes said second armature switch energizing said first coil which closes said first annature switch to maintain said first coil energized following release of said remote start switch.

7. The electrical system of claim 6 wherein said local switch means include a normally closed local stop switch in series with said first coil, whereupon opening of said local stop switch following release of said local or remote start switch deenergizes said first coil which opens said first armature switch, said remote switch means include a normally closed remote stop switch in parallel with said remote start switch, and said third relay means include a normally energized third coil in series with said remote stop switch and a normally closed third armature switch in series with said first coil, whereupon opening of said remote stop switch following release of said local or remote start switch deenergizes said third coil which opens said third armature switch deenergizing said first coil which opens said first armature switch.

8. The electrical system of claim 7 wherein said primary circuit means include a local pilot lamp at said local station and a remote pilot lamp at said remote station, each'being ignited upon closing of said local or remote start switch to indicate energization of said device.

9. The electrical system of claim 8 wherein said device comprises a magnetic loom brake, said primary circuit means include a voltage source capable of energizing said brake, and 5 said secondary circuit means include a separate normal telephone voltage source.

"H.050 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. ,375 Dated January 18, 1972 Inventofls) Stanley E. Armstrong It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column'2, line 28, "100" should read -llO-.

Column 2, line 53, before "stop" insert local-.

Column 2, line 74, afterT'relay" insert armature-.

Column 3, line 2, after 'series" delete"-e-.

Column 4, line 39, "deenergizes" should read -i--deenergizing.

Signed and sealed this 29th day of August 1972.

Attest:

.EDWARD M.FLETCHER,JR. ROBERT GOTTSCHALK A ttesting Officer Commissioner of Patents Po-wso UNITED STATES PATENT OFFICE (s/ss) CERTIFICATE OF CORRECTION Patent No. 3,636,375 Dated January 18, 1972 Inventor(s) Stanley E Armstrong It is certified that error appears in the above-identified patent and that: said Letters Patent are hereby corrected as shown below:

Column 2, line 28, "100" should read ll0.

Column 2, line 53, before "stop" insert local.

Column 2, line 74, after "relay" insert armature.

Column 3, line 2, after "series" delete -e-.

Column 4, line 39, "deenergizes" should read deenergizing-.

Signed and sealed this 29th day of August 1972.

(SEAL) Attest:

EDWARD- M.FLETCHERJR. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents 

1. An electrical system for selectively energizing and deenergizing an electrical device from both local and remote stations regardless of the station at which the previous energization or deenergization occurred, and wherein the improvement comprises: primary circuit means including said device, local switch means at said local station and first relay means, for selectively energizing said device from said local station upon actuation of said local switch means actuating said first relay means to complete said primary circuit means to said device and for selectively deenergizing said device from said local station upon deactuation of said local switch means deactuating said first relay means to break said primary circuit means to said device, and separate secondary circuit means electrically insulated from said primary circuit means and including remote switch means at said remote station, second relay means operatively associated with said first relay means and third relay means operatively associated with said first relay means, for selectively energizing said device from said remote station upon actuation of said remote switch means actuating said second relay means actuating said first relay means to complete said primary circuit means to said device and for selectively deenergizing said device from said remote station upon deactuation of said remote switch means deactuating said third relay means deactuating said first relay means to break said primary circuit means to said device.
 2. The electrical system of claim 1 wherein said local switch means include a normally open local start switch, and said first relay means include a normally deenergized first coil in series with said local start switch and a normally open first armature switch coupled across said local start switch, whereupon closing of said local start switch energizes said first coil which closes said first armature switch to maintain said first coil energized upon release of said local start switch.
 3. The electrical system of claim 2 wherein said local switch means include a normally closed local stop switch in series with said first coil, whereupon opening of said local stop switch following release of said local start switch deenergizes said first coil which opens said first armature switch.
 4. The electrical system of claim 1 wherein said remote switch means include a normally open remote start switch, said second relay means include a normally deenergized second coil in series with said remote start switch and a normally open second armature switch, and said first relay means include a normally deenergized first coil in series with said normally open second armature switch and a normally open first armature switch coupled across said second armature switch, whereupon closing of said remote start switch energizes said second coil which closes said second armature switch energizing said first coil which closes said first armature switch to maintain said first coil energized upon release of said remote start switch.
 5. The electrical system of claim 4 wherein said remote switch means include a normally closed remote stop switch in parallel with said remote start switch and said third relay means include a normally energized third coil in series with said remote stop switch and a normally closed third armature switch in series with said first coil, whereupon opening of said remote stop switch following release of said remote start switch deenergizes said third coil whIch opens said third armature switch deenergizes first coil which opens said first armature switch.
 6. The electrical system of claim 1 wherein said local switch means include a normally open local start switch, said first relay means include a normally deenergized first coil in series with said local start switch and a normally open first armature switch coupled across said local start switch, whereupon closing of said local start switch energizes said first coil which closes said first armature switch to maintain said first coil energized upon release of said local start switch, said remote switch means include a normally open remote start switch, and said second relay means include a normally deenergized second coil in series with said remote start switch and a normally open second armature switch coupled across said local start switch, whereupon closing of said remote start switch energizes said second coil which closes said second armature switch energizing said first coil which closes said first armature switch to maintain said first coil energized following release of said remote start switch.
 7. The electrical system of claim 6 wherein said local switch means include a normally closed local stop switch in series with said first coil, whereupon opening of said local stop switch following release of said local or remote start switch deenergizes said first coil which opens said first armature switch, said remote switch means include a normally closed remote stop switch in parallel with said remote start switch, and said third relay means include a normally energized third coil in series with said remote stop switch and a normally closed third armature switch in series with said first coil, whereupon opening of said remote stop switch following release of said local or remote start switch deenergizes said third coil which opens said third armature switch deenergizing said first coil which opens said first armature switch.
 8. The electrical system of claim 7 wherein said primary circuit means include a local pilot lamp at said local station and a remote pilot lamp at said remote station, each being ignited upon closing of said local or remote start switch to indicate energization of said device.
 9. The electrical system of claim 8 wherein said device comprises a magnetic loom brake, said primary circuit means include a voltage source capable of energizing said brake, and said secondary circuit means include a separate normal telephone voltage source. 